CN111964936A - Underwater laser welding power detection and automatic control test device - Google Patents

Underwater laser welding power detection and automatic control test device Download PDF

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Publication number
CN111964936A
CN111964936A CN202010858332.9A CN202010858332A CN111964936A CN 111964936 A CN111964936 A CN 111964936A CN 202010858332 A CN202010858332 A CN 202010858332A CN 111964936 A CN111964936 A CN 111964936A
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water
test
laser welding
automatic control
laser
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CN111964936B (en
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朱加雷
李丛伟
焦向东
朱昱颖
苗春雨
王凯
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Beijing Institute of Petrochemical Technology
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Beijing Institute of Petrochemical Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Laser Beam Processing (AREA)

Abstract

The invention discloses an underwater laser welding power detection and automatic control test device, which comprises a test water tank, a water storage tank, a laser power meter, a placing platform and a camera monitoring mechanism, wherein a plane lens, a displacement sensor, a laser focus zero setting scale and a water inlet pipe are arranged on the test water tank; the laser power meter is connected with the signal receiving device through wireless transmission signals, and real-time data monitoring is achieved. The camera monitoring mechanism can monitor the running condition of the whole device, and a control device system is arranged on the water storage tank; the control device system is connected with the remote controller through wireless transmission signals and is connected with the battery, the electromagnetic valve, the camera and the displacement sensor through circuits. The device has the advantages of strong environment adaptability, reasonable structure, high intelligent control degree, accurate zero setting of the laser focus, convenient use and reliable operation, and can be used for controlling the tests of changing the water depth, monitoring the laser power in the process of switching different liquid media and the like.

Description

Underwater laser welding power detection and automatic control test device
Technical Field
The invention relates to an underwater laser welding test device, in particular to an underwater laser welding power detection and automatic control test device capable of automatically controlling water depth and monitoring laser power.
Background
The demand of human beings on energy is more and more urgent, ocean oil gas, nuclear power and inland water resource are developed to become main new sources of human energy, and the connection of underwater steel structural members in related projects and the repair of the structural members after service can not be realized by the participation of an underwater welding technology. The underwater laser welding has the following advantages: the laser beam can be transmitted in a long distance through the optical fiber, the laser spot is small, the control precision is high, and the laser beam welding device is suitable for welding maintenance of positions with high requirements on welding precision; meanwhile, the heat input of laser welding is low, and the cooling speed is high, so that the heat affected zone of a welding seam is small, the residual stress level is low, and the welding quality is high; the laser welding system is easy to simplify and integrate, and is particularly suitable for equipment maintenance with narrow working positions. In addition, because the laser energy density is concentrated, the influence of the water pressure on the welding area of the underwater laser welding is small, and the welding of most materials can be realized. Therefore, underwater laser welding is regarded as an underwater maintenance technology with great development and application potential and receives more and more extensive attention.
The underwater wet laser welding means that the welded part is directly exposed in an underwater environment, water in a welding area is discharged without any other measures, a laser beam acts on the surface of the welded part after passing through an aqueous medium, the laser beam interacts with the welded part, and the welded part absorbs the energy of the laser beam and is melted. Meanwhile, the temperature of the workpiece is increased rapidly due to the interaction of the two components, the surrounding liquid medium in contact with the workpiece is vaporized continuously at high temperature, bubbles are formed continuously, and the underwater wet laser welding has the advantages of simple equipment, low cost, flexible operation, strong adaptability and the like. The quality of the weld seam of the underwater wet laser welding is affected by many factors, such as the underwater environmental characteristics, the laser power, the welding speed, the wire feeding speed, and the like. The underwater environment is much different from the land environment, the thermal conductivity of water is about 20 times that of air, the density is 770 times that of air, and there is a large pressure under water. In underwater wet laser welding, the main factors affecting the quality of the beam include the following: attenuation in water, absorption and refraction of bubbles, water-gas interface disturbance, light beam expansion, scattering, absorption and refraction of aerosol particles.
In order to ensure the maintenance quality of wet underwater laser welding and explore the influence rule and mechanism of the water environment on the laser beam transmission process, no related integrated test device exists at present.
Disclosure of Invention
The invention aims to provide an underwater laser welding power detection and automatic control test device.
The purpose of the invention is realized by the following technical scheme:
the invention discloses an underwater laser welding power detection and automatic control test device, which comprises a laser power meter, a test water tank and a water storage tank, wherein the test water tank is communicated with the side wall of the water storage tank through a water pipe, and an electromagnetic valve is arranged on the water pipe;
a camera monitoring mechanism is arranged on one side of the test pool, a planar lens is mounted on the bottom wall of the test pool, and a displacement sensor, a laser focus zero setting scale and a drain pipe are mounted on the side wall of the test pool;
a control device system and a battery are installed on one side wall of the water storage tank;
the control device system is provided with a chip and a signal receiving and transmitting module, and is respectively connected with the battery, the electromagnetic valve, the camera monitoring mechanism and the displacement sensor through lines, and the signal receiving and transmitting module is connected with the wireless signal receiving equipment and the remote controller through wireless signals;
the laser power meter is connected with the wireless signal receiving equipment and the remote controller through wireless signals.
According to the technical scheme provided by the invention, the underwater laser welding power detection and automatic control test device provided by the embodiment of the invention has the advantages of simple structure, high intelligent degree and convenience in use, and is suitable for detecting the laser power in the underwater laser welding process.
Drawings
Fig. 1 is a schematic view of an overall structure of an underwater laser welding power detection and automatic control testing device provided in an embodiment of the present invention.
FIG. 2 is a schematic view of a planar lens according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a data acquisition principle of a laser power meter in the embodiment of the present invention.
Fig. 4 is a schematic view of a placement platform in an embodiment of the invention.
Fig. 5 is a schematic diagram of a camera monitoring mechanism according to an embodiment of the present invention.
FIG. 6 is a schematic diagram of the experimental principle in the embodiment of the present invention.
Fig. 7 is a schematic diagram of the placement position of the laser power meter in the embodiment of the invention.
In the figure:
1-water storage tank, 2-control device system, 3-battery, 4-water outlet pipe, 5-electromagnetic valve, 6-water inlet pipe, 7-displacement sensor, 8-test water tank, 9-laser focus zero setting scale, 10-plane lens, 11-mounting groove, 12-water outlet pipe, 13-wireless signal receiving equipment, 14-remote controller, 15-camera monitoring mechanism, 16-laser power meter, 17-placing platform, 18-silica gel sealing ring, 19-groove, 20-high pressure cabin, 21-laser welding head, 22-camera and 23-support.
Detailed Description
The embodiments of the present invention will be described in further detail below. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
The invention relates to an underwater laser welding power detection and automatic control test device, which has the preferred specific implementation modes that:
the device comprises a laser power meter, a test water tank and a water storage tank, wherein the test water tank is communicated with the side wall of the water storage tank through a water pipe, and an electromagnetic valve is arranged on the water pipe;
a camera monitoring mechanism is arranged on one side of the test pool, a planar lens is mounted on the bottom wall of the test pool, and a displacement sensor, a laser focus zero setting scale and a drain pipe are mounted on the side wall of the test pool;
a control device system and a battery are installed on one side wall of the water storage tank;
the control device system is provided with a chip and a signal receiving and transmitting module, and is respectively connected with the battery, the electromagnetic valve, the camera monitoring mechanism and the displacement sensor through lines, and the signal receiving and transmitting module is connected with the wireless signal receiving equipment and the remote controller through wireless signals;
the laser power meter is connected with the wireless signal receiving equipment and the remote controller through wireless signals.
The test pool is of a rectangular cylinder structure, the side wall of the test pool is provided with a water inlet pipe mounting hole, the mounting hole is matched with the external thread of the water inlet pipe, the bottom wall of the test pool is provided with a mounting groove, and the mounting groove is matched with the planar lens in a mounting way;
the laser focus zero setting scale and the displacement sensor are respectively matched with the side wall of the test water pool through respective mounting holes.
The plane lens is a quartz circular sheet, and the direction and the focal length of laser are not changed after the laser penetrates through the plane lens;
the laser focus zero setting scale is a scale with scales, and the precision of the laser focus zero setting scale is 0.1 mm;
the displacement sensor is a non-contact liquid level sensor.
The water storage tank is of a rectangular cylinder structure, a water outlet pipe mounting hole is formed in the side wall of the water storage tank, and the mounting hole is matched with the external thread of the water outlet pipe.
The laser power meter is of a cubic structure, is placed on the placing platform and is located under the lens, a groove and a silica gel sealing ring are arranged on the periphery of the placing platform, and the placing platform and the test water tank are in sealing fit through the silica gel sealing ring.
The battery is a lithium battery which is provided with a double-sided adhesive tape and a magic tape, and the magic tape is matched with a magic tape on one side wall of the water storage tank.
The electromagnetic valve is an electromagnetic ball valve and is provided with a bidirectional water pipe mounting hole, and the two mounting holes are respectively in threaded mounting fit with the water inlet pipe and the water outlet pipe;
the camera monitoring mechanism comprises a camera, and the camera is installed on the support.
During the experiment, the device is arranged in a high-pressure cabin, the laser welding head is arranged above the test water pool, and the wireless signal receiving equipment and the remote controller are arranged outside the high-pressure cabin.
The underwater laser welding power detection and automatic control test device is reasonable in structure, high in intelligent control degree, convenient to use and reliable in operation, and can be used for controlling and changing water depth, switching different liquid media, monitoring laser power and accurately adjusting zero of a laser focus.
The specific embodiment is as follows:
as shown in fig. 1 to 7, the underwater laser welding power detection and automatic control test device comprises a test water tank, a water storage tank, a laser power meter, a placing platform and a camera monitoring mechanism, wherein a plane lens, a displacement sensor, a laser focus zeroing scale and a water inlet pipe are mounted on the test water tank; the laser power meter is connected with the signal receiving device through wireless transmission signals, and real-time data monitoring is achieved. The camera monitoring mechanism is provided with a camera and a bracket, the camera can monitor the running condition of the whole device, and the bracket is matched with the camera to play a stabilizing role; the placing platform is provided with a groove and a silica gel sealing ring; the water inlet pipe is provided with an electromagnetic valve, and the rear end of the electromagnetic valve is provided with a water outlet pipe; the water outlet pipe is provided with a water storage tank, and the water storage tank is provided with a control device system; the control device system is provided with a battery; the control device system is connected with the remote controller through a wireless transmission signal; the control device system is connected with the battery, the electromagnetic valve, the camera and the displacement sensor through a circuit. The test water tank is provided with a water inlet pipe mounting hole, a mounting groove, a drain pipe and a laser focus zero setting scale, wherein the mounting hole is matched with the external thread of the water inlet pipe; the mounting groove is matched with the plane lens; the laser focus zero setting scale is matched with a test water tank through a mounting hole; the drain pipe is convenient for discharging liquid medium after the test.
The invention relates to an underwater laser welding power detection and automatic control test device, wherein a plane lens 10 in a figure 2 is a round sheet and is provided with an antireflection film; the flat lens 10 fits into a mounting slot 11 on the test basin 8.
The invention discloses an underwater laser welding power detection and automatic control test device, wherein a laser power meter 16 in a figure 3 is of a cubic structure, and is placed on a placing platform 17 in a laser power measurement experiment, and the laser power meter 16 is connected with a wireless signal receiving device 13 through a wireless transmission signal, so that real-time data monitoring is realized. The wireless signal transmission is beneficial to the pressure environment test.
The invention discloses an underwater laser welding power detection and automatic control test device, wherein a figure 4 shows a placing platform 17 which is in a rectangular three-dimensional structure and is provided with an annular closed groove 19, a silica gel sealing ring 18 is arranged in the groove, the placing platform 17 is in sealing fit with a test water tank 8 through the silica gel sealing ring 18, and the placing space of a laser power meter 16 is kept in a normal-pressure environment.
The invention discloses an underwater laser welding power detection and automatic control test device, wherein a camera monitoring mechanism 16 is shown in figure 5, the camera monitoring mechanism 16 is provided with a camera 22 and a support 23, the camera 22 can monitor the running condition of the whole device, and the support 23 is matched with the camera 22 to play a stabilizing role.
The invention discloses an underwater laser welding power detection and automatic control test device, wherein FIG. 6 is a schematic diagram of a test principle, and when a high-pressure cabin 20 is not pressurized, a test for obtaining laser power under normal pressure can be completed; when the hyperbaric chamber 20 is pressurized, a laser power test can be obtained under a pressure environment;
the invention discloses an underwater laser welding power detection and automatic control test device, wherein a schematic diagram of a laser power meter placing working position is shown in fig. 7, a laser power meter 16 is arranged right below a lens 10 and placed on a placing platform 17 to detect the change of laser power;
according to the underwater laser welding power detection and automatic control test device disclosed by the invention, the test water tank and the water storage tank are made of acrylic materials, so that corrosion in a long-term use process in water is prevented, and adhesion, assembly and forming are facilitated; in the work of the underwater laser welding power detection and automatic control test device, a laser welding head 21 is adjusted to a position to be tested through a laser focus zero setting scale 9, and an operator opens an electromagnetic valve 5 through operating a remote controller 14; the water stored in the water storage tank 1 flows into a test water tank 8 through a water outlet pipe 4, an electromagnetic valve 5 and a water inlet pipe 6 by virtue of height difference; the depth of the test pool water fed back by the wireless signal receiving equipment 13 is observed to reach the depth of the test water, and the electromagnetic valve 5 is closed by the remote controller 14; the laser welding head 21 is fed with laser, and laser beams pass through the water and the plane lens 10 in the test water tank 8 and reach the position where the laser power meter 16 receives the laser beams; the attenuation conditions of the laser power under the conditions of different depths and different laser powers are obtained by changing the depth of the liquid medium in the test water tank 8; and monitoring the condition that laser beams with different laser powers penetrate different water depths through a camera monitoring mechanism.
The underwater laser welding power detection and automatic control test device has the advantages that:
control solenoid valve 5 through controlling means system 2, connect camera 22 and displacement sensor 7 through controlling means system 2, through controlling means system 2 wireless connection remote controller 14 and wireless signal receiving equipment 13, intelligent degree is high, makes things convenient for remote control, is applicable to experimental under dangerous environment and pressure environment, obtains laser power change schematic diagram under the pressure environment as shown in fig. 6. The laser power detection system in the automatic control test device obtains information through wireless signal transmission, and the test environment adaptability is strong. The automatic control experimental device is provided with the laser focus zero setting scale 9, so that the laser focus zero setting in the experimental process is facilitated, and the defocusing amount is changed. The camera monitoring mechanism 15 monitors the experimental process in real time in the automatic control testing device, so that an operator can accurately control the testing device and record the testing process.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. The underwater laser welding power detection and automatic control test device is characterized by comprising a laser power meter (16), a test water tank (8) and a water storage tank (1), wherein the test water tank (8) is communicated with the side wall of the water storage tank (1) through a water pipe, and an electromagnetic valve (5) is arranged on the water pipe;
a camera monitoring mechanism (15) is arranged on one side of the test water tank (8), a plane lens (10) is installed on the bottom wall of the test water tank (8), and a displacement sensor (7), a laser focus zero setting scale (9) and a drain pipe (12) are installed on the side wall of the test water tank;
a control device system (2) and a battery (3) are installed on one side wall of the water storage tank (1);
the control device system (2) is provided with a chip and a signal receiving and transmitting module, and is respectively connected with the battery (3), the electromagnetic valve (5), the camera monitoring mechanism (15) and the displacement sensor (7) through lines, and the signal receiving and transmitting module is connected with a wireless signal receiving device (13) and a remote controller (14) through wireless signals;
the laser power meter (16) is connected with the wireless signal receiving equipment (13) and the remote controller (14) through wireless signals.
2. The underwater laser welding power detection and automatic control test device as claimed in claim 1, wherein the test water tank (8) is a rectangular cylinder structure, the side wall of the test water tank is provided with a mounting hole of the water inlet pipe (6), the mounting hole is matched with the external thread of the water inlet pipe (6), the bottom wall of the test water tank is provided with a mounting groove (11), and the mounting groove (11) is matched with the planar lens (10);
the laser focus zero setting scale (9) and the displacement sensor (7) are respectively matched with the side wall of the test water pool (8) through respective mounting holes.
3. The underwater laser welding power detection and automatic control test device according to claim 2, wherein the plane lens (10) is a quartz circular thin sheet, and the direction and the focal distance of laser are not changed through the plane lens;
the laser focus zero setting scale (9) is a scale with scales, and the precision of the scale is 0.1 mm;
the displacement sensor (7) is a non-contact liquid level sensor.
4. The underwater laser welding power detection and automatic control test device according to claim 1, 2 or 3, wherein the water storage tank (1) is of a rectangular cylinder structure, and the side wall of the water storage tank is provided with a water outlet pipe (4) mounting hole which is matched with the external thread of the water outlet pipe (4).
5. The underwater laser welding power detection and automatic control test device according to claim 1, 2 or 3, characterized in that the laser power meter (16) is a cubic structure, and is placed on the placing platform (17) and located right below the lens (9), a groove (19) and a silica gel sealing ring (18) are arranged on the periphery of the placing platform (17), and the placing platform (17) is in sealing fit with the test water tank (8) through the silica gel sealing ring (18).
6. The underwater laser welding power detection and automatic control test device according to claim 1, 2 or 3, wherein the battery (3) is a lithium battery having a double-sided adhesive-backed magic tape, and the magic tape is matched with a side wall magic tape of the water storage tank (1).
7. The underwater laser welding power detection and automatic control test device according to claim 1, 2 or 3, wherein the electromagnetic valve (5) is an electromagnetic ball valve which is provided with a bidirectional water pipe mounting hole, and the two mounting holes are respectively matched with the water inlet pipe (6) and the water outlet pipe (4) in a threaded mounting way.
8. The underwater laser welding power detection and automatic control test device according to claim 1, 2 or 3, characterized in that the camera monitoring mechanism (15) comprises a camera (22), and the camera (22) is mounted on a bracket (23).
9. The underwater laser welding power detection and automatic control test device according to claim 1, 2 or 3, characterized in that, during the test, the device is arranged in a high-pressure chamber (20), a laser welding head (21) is arranged above the test water tank (8), and the wireless signal receiving equipment (13) and the remote controller (14) are arranged outside the high-pressure chamber (20).
CN202010858332.9A 2020-08-24 2020-08-24 Underwater laser welding power detection and automatic control test device Active CN111964936B (en)

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